Technological development in communications and electronics has made the growing expansion of the Internet of Things (IoT). IoT is expected to make a great impact to our society because smart devices in IoT are easily integrated into existing service. As a result, standardization of technologies to support the IoT is becoming more important to realize a smart society through different service domains. This paper presents a survey on the current state of the art of standards for IoT technologies and gives a brief introduction to related standards and recent research areas in IoT. Finally, it also proposes an idea of the future platform of scalable IoT systems. The proposed idea employs IP mobility technologies to realize inter-operability among IoT devices in different networks.